Check the refernces to Koko and Waterbird. In addition, Koko taught her children signing from birth.
When we get into the area of languages we need to look at it as a comparison to teaching someone a new, very complex talent when we cannot use the basic language skills as a tool.
However there are some very clear examples that wild chimps use planning, spatial awareness, time sense and communication during a hunt.
The pick a target prey. They divide into sub-groups and each group assumes a different task and role. They wait while that catchers circle arouond the prey and get into position. The drivers then begin to herd the prey towards the catchers.
This is done in a three dimensional space over a relatively large area with parties being out of direct contact, over an extended period of time, in a situation that is fluid and constantly changing and acting independantly to achieve a team goal.
Aslan is not a Tame Lion